Experimental Study of Pulse with Reverse Platings on Nickel-Iron Alloys from Sulphate Solutions

SUMMARYEffects of pulse operating parameters on nickel-iron electrodeposition have been studied at the rotating disc electrode (RDE). It is shown that for a specified pulse current density, a higher reverse current density induces both lower average nickel and iron deposition rates indicating that active dissolutions of both nickel and iron occur during the reverse period. The effect of pulse frequency on the alloy compositions depends on the disc rotation speed used, ie, composition is strongly affected by the mass transfer. The averaged deposition rates of nickel and iron also depend on the plating baths used. Influences of various compositions of plating baths on Ni-Fe deposition can be explained by electrode surface adsorption or solution complexation of the introduced organic additives.